Explosion proof electric motor

Explosion Proof Electric Motor:

Be specially designed for selected application and confirms to JB/T7565.1-2004 and IEC standard, which is totally-enclosed and fan-cooled .

With the explosion proof symbols:

ExdI Mb, ExdIIA T4 Gb, ExdHB T4 Gb

Please see the common explosive mixture classification in the table at bellow (The class in the table correspond to the electrical equipment category).

Grade	T1	T2	T3	T4
I	Methane, Ammonia, Acetic acid	Butanol, Acetic anhydride	Cyclohexane
IIA	Ethane, Propane, Acetone, Styrene, Benzene, Benzene, Toluene, Carbon monoxide	Ethane, Ethanol, Propylene, Butyl acetate, Amyl acetate, Chlorine b Tong, Ethyl acetate , Methanol	Pentane, Ethane, Kwai alkanes, Octane, Kwai alkanes, Gasoline	Ethyl ether, Acetic acid
IIB	City gas, Coke oven gas	Epoxy ethane, 1.3 a butadiene, Ethylene	Dimethyl ether, Hydrogen sulfide	Ethyl methyl, Diethyl ether, Tetrachloroethylene
IIC	Chlorine water gas, Chlorine	Acetylene	/	/

Temperature Classes as following table:

Temperature classes	T1	T2	T3	T4
The ignition temperature (°C)	450	300≤450	200≤300	135≤200
The allowed Maximum equipment surface temperature (°C)	450	300	200	135

Can be used in inflammable and explosive places, which does not produce sparks when the motor is working.

Be widely used in fields and industries, such as coal, mine, petroleum, petrochemical, chemical, textile, metallurgy, city gas, transportation, grain & oil processing, paper making, medicine and others.

At the same time, as a major drive equipment, which is often used to drive pumps, fans, compressors and other mechanical transmission and other machines.

With the advantage of higher efficiency, long working life, energy saving, high starting torque, low noise, small vibration, big breakaway torque, reliable operation performance, and convenient  maintenance.

Can be equipped with re-greasing system when the motor frame size is 160MM and above.

Labeling Standards

Series Code + Frame Size + Iron Core Length No. + Motor Poles

Example: YB 90 L – 2

YB—explosion proof electric motor

90—the second part means the height of motor center (when the motor has no foot, it is same to motor with foot)

L—the third part means the base iron core length no.(S-Short Base, M-Medium Base, L-Long Base)

2—the forth part means the motor poles, this is a 2 poles motor, synchronous speed is 3000 r/min (50Hz); 3600 r/min (60Hz)

Service Conditions

Voltage Wave: ±5%

Frequency Wave: ±2%

Ambient Temperature: -15~40°C

Altitude: 1000 m.a.s.l

Humidity: ≦90%

Protection Class: IP44, IP54, IP55

Insulation Class: F, H

Temp. Rising: 80K (B class), 105K (F class)

Cooling Method: IC411 (Fan cooling)

Working Duty: S1 (Continuous)

Tolerance

Efficiency: -0.1 x (1-η)

Power Factor: - (1- cos ϕ)/6, -0.02(min.)

Rotation: ±20%

Locked Current: ±20%

Locked Torque: -15%, +20%

Max. Torque: -10%

Moment of Inertia (J): ±10%

Connection: Star-connection for up to 3kW; Delta-connection for 4kW and above